Product category: Analogue and Mixed Signal ICs
News Release from: Maxim Integrated Products | Subject: MAX5881
Edited by the Electronicstalk Editorial Team on 16 January 2008
D/A convertor simplifies RF design
The MAX5881 solution is ideal for Docsis 3.0-compliant edge QAM devices and cable modem termination systems.
Available now from Maxim Integrated Products, the MAX5881 is claimed to be the industry's first 12bit 4.3Gsample/s DAC that can directly synthesise multichannel QAM signals in the 50 to 1000MHz cable downstream band Offering excellent spurious, noise and adjacent-channel performance, this device meets the requirements of Docsis 3.0 for up to four contiguous channels per RF port
This article was originally published on Electronicstalk on 27 Aug 2002 at 8.00am (UK)
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In addition to enabling a fully digital cable upconversion solution, the MAX5881 greatly simplifies the RF portion of the design, thus achieving a lower cost per QAM channel than analogue solutions.
This simplification eliminates the need for many of the components used in the traditional analogue solution, such as an upconversion modulator or mixer, a downconversion mixer, fixed and agile frequency synthesisers, amplifiers and filters.
Providing higher density, lower power, and lower cost per channel than the traditional analogue approach, the MAX5881 solution is ideal for Docsis 3.0-compliant edge QAM devices and cable modem termination systems (CMTS).
The MAX5881 operates from 3.3 and 1.8V supplies, and consumes 1.2W at 4.0Gsample/s.
Fully specified over the 0 to +70C commercial temperature range, it is offered in a compact, 11 x 11mm, RoHS-compliant, 169-ball CSBGA package.
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